Wyniki wyszukiwania - BazTech

1

Analysis of the airframe repair node

Rośkowicz Marek, Barca Iga

Technologia i Automatyzacja Montażu

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2022

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nr 3

42--48

EN

Polymer composite materials can be used both for the production of semi-monocoque structures and for the repair of aircraft airframes. Of all the elements of the semi-monocoque structure, the airframe skin is most often damaged during operation. The fragments of the skin between the frame elements of the semi-monocoque structure are considered as a thin-walled plate. The paper presents an analysis of the repair node of a metal plate subjected to uniform shear. The model of the repaired plate made in the Ansys Workbench environment was used for the analysis. The boundary conditions were defined by means of an articulated frame using the possibilities of the computing environment in the scope of, defining elements among others. The model was initially verified experimentally, assuming that it can be used to carry out a comparative analysis of two methods of repairing a damaged plate, using CFRP (Carbon Fiber Reinforced Polymer) and GFRP (Glass Fiber Reinforced Polymer) materials. Analyzing the obtained results, it was found that the repair does not restore the original strength of the damaged structure, however, it reduces the stress of the plate material around the opening by 10%.

PL

Polimerowe materiały kompozytowe mogą być wykorzystywane zarówno do wytwarzania elementów konstrukcji półskorupowych jak i do napraw już eksploatowanych metalowych płatowców statków powietrznych. Spośród wszystkich elementów konstrukcji półskorupowej, pokrycie płatowca ulega najczęściej uszkodzeniom eksploatacyjnym. Fragmenty pokrycia pomiędzy elementami szkieletu konstrukcji półskorupowej rozpatruje się jako płytę cienkościenną. W pracy przeprowadzono analizę węzła naprawczego metalowej płyty poddanej równomiernemu ścinaniu. Do analizy wykorzystano model naprawianej płyty wykonanej w środowisku Ansys Workbench. Warunki brzegowe zdefiniowano za pomocą przegubowej ramki wykorzystując możliwości środowiska obliczeniowego w zakresie m.in. definiowania kontaktów. Model wstępnie zweryfikowano eksperymentalnie, przyjmując założenie, że może być wykorzystywany do przeprowadzenia analizy porównawczej dwóch metod naprawy uszkodzonej płyty, z wykorzystaniem materiałów CFRP (Carbon Fibre Reinforced Plastic) oraz GFRP (Glass Fibre Reinforced Plastic). Analizując otrzymane wyniki stwierdzono, że naprawa nie przywraca pierwotnej wytrzymałości uszkodzonej struktury, jednakże zmniejsza wytężenie materiału płyty wokół otworu o 10%.

2

Hydraulic analysis of gate valve using computational fluid dynamics (CFD)

Žic Elvis, Banko Patrik, Lešnik Luka

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2020

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Vol. 29, No. 3

275--288

EN

As a very important element of most water supply systems, valves are exposed to the effects of strong hydrodynamic forces. When exposed to large physical quantities, the valve and piping can be damaged, which could endanger the performance of a water supply system. This is the main reason why it is necessary to foresee and determine the maximum values of velocity, pressure and other physical quantities that can occur in the system under certain conditions. Predicting extreme conditions allows us to correctly size the valve for the expected conditions to which the valve might be exposed, which is also the main objective of this paper. One of the methods for predicting and determining extreme values on a valve is to perform a simulation with computational fluid dynamics (CFD). This is exactly the method used in the preparation of this paper with the aim of gaining insight into the physical magnitudes for models of gate valves positioned inside a pipe under characteristic degrees of valve closure. The Ansys CFX 19.1 and Ansys Fluent 19.1 software was used to simulate the hydrodynamic analysis and obtain the required results. The hydrodynamic analysis was performed for four opening degrees of gate valve

3

Realization and Verification of Data Conversion from Laser Scanner to FEM

Sapietová Alžbeta, Štalmach Ondrej, Sága Milan, Stančeková Dana, Gajdoš Lukáš

Advances in Science and Technology. Research Journal

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2020

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Vol. 14, no 1

69--74

EN

This paper deals with the data processing in the form of a point cloud scanned using a handheld 3D laser scanner. The aim of the paper was to use this data to create a representative FEM model and compare two different ap¬proaches, one them involved creating a CAD model and the other one did not. The data processing was carried out in the freeware systems MeshLab and Meshmixer and FEM analysis in the software ANSYS Workbench.

4

Optimization of fan of induction motor in the Ansys Workbench

Janda M., Makki Z., Deeb R.

Poznan University of Technology Academic Journals. Electrical Engineering

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2012

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No. 72

141--147

EN

This paper deals with the optimization of cooling of electric machines using Ansys Workbench. In many areas of electrical machines are increasingly used optimization methods to achieve greater performance and improved efficiency of the individual parts of electrical machines. These methods are very often connecting to computer programs such as Ansys, in order to obtain the best results. The program Ansys Workbench is several optimization algorithms that can be connected to the analysis of any group of physical fields. This allows other programs without the need to achieve optimal results in the design of electrical machines. This article specifically addresses the application of these algorithms for the adaptation of design changes the fan induction motor. Optimization was used to size the fan blades to achieve the greatest possible pressure coolant. The main dimensions of this design are limited fan induction motor and therefore are not optimized. The article discussed the results of this optimization, and also summarizes the main advantages and disadvantages of using this procedure.